package com.test;

public class Ex04_3{
	public static void main(String args[]){
		int score = 81;
		char grade;
		
		if(score>=90){
			grade='A';
		}else if(score >=80){
			grade='B';
		}else if(score >=70){
			grade='C';
		}else if(score >=60){
			grade='D';
		}else {
			grade='F';
		}
		System.out.println(score +":"+grade);			
	}
}